Hi,
I have the problem if I use super/subscript within an attributed string, then
it doesn't seems to work with CATextLayer, and I don't know why.
I tried NSSuperscriptAttributeName and NSBaselineOffsetAttributeName
string = [[NSMutableAttributedString alloc] init];
[string beginEditing];
[string replaceCharactersInRange:NSMakeRange(0,0) withString:@"CO2"];
[string addAttribute:NSFontAttributeName value:[NSFont
controlContentFontOfSize:12] range:NSMakeRange(0,3)];
[string addAttribute:NSForegroundColorAttributeName value:[NSColor
blackColor] range:NSMakeRange(0,3)];
[string addAttribute:NSUnderlineStyleAttributeName value:[NSNumber
numberWithInt:NSUnderlineStyleSingle] range:NSMakeRange(0,2)];
// first case
[string addAttribute:NSSuperscriptAttributeName value:[NSNumber
numberWithInt:-1] range:NSMakeRange(2,1)];
// second case
//[string addAttribute:NSBaselineOffsetAttributeName value:[NSNumber
numberWithInt:-5] range:NSMakeRange(2,1)];
// third case
//[string subscriptRange:NSMakeRange(2, 1)];
[string endEditing];
It works perfectly with drawAtPoint:
- (void)drawRect:(NSRect)rect {
[string drawAtPoint:NSMakePoint(10, 20)];
}
But not with a CATextLayer
- (void)awakeFromNib {
self.wantsLayer = YES;
layer = [CATextLayer layer];
layer.string = string;
layer.bounds = CGRectMake(0, 0, layer.preferredFrameSize.width,
layer.preferredFrameSize.height);
layer.position = CGPointMake(10, 150);
layer.borderWidth = 1;
layer.anchorPoint = CGPointMake(0,0);
[self.layer addSublayer:layer];
}
Does anyone know how to solve it or have an explanation why it doesn't work?
Thank you,
Stephan Michels.
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